“…Echocharacters studies have been widely used in order to determine sediment processes in various deep-sea environments, frequently in passive margin context (Jacobi, 1976;Embley and Langseth, 1977;Damuth, 1980a;Damuth and Flood, 1985;Pratson and Laine, 1989;Damuth, 1994;Gaullier and Bellaiche, 1998;Loncke et al, 2002), but more rarely in convergent margin contexts (Henry et al, 1990;Whitmore et al, 1999;Chow et al, 2001;Chiu and Liu, 2008). The more rugged seafloor and the higher slope values generally observed in such environment may disturb acoustic acquisition and explain the lack of interest in using echo-character mapping in convergent margin context.…”